Spindle



E. A. CUNNIFF.

SPINDLE.

APPLICATION HLED MAR.4, 1920.

Patented Oct. 25, 1921.

Fig.2.

UNITED STATS EDWARD A. GUN'NIFF, OF FALL RIVER MASSACHUSETTS, ASSIGNOR TO DRAIPER CORPORATION, OF HOTPEDALE, IVLASSACHUSETTS, A CORPORATION OF MAINE.

- SPINDLE.

Specification of Letters Patent.

Patented Oct. 25,1921.

Application filed March 4, 1920. Serial No. 363,153.

To all whom it may concern:

Be it known that I, EDWARD A. CUNNIFF, a citizen of the United States, and resident of Fall River, county of'Bristol, State of Massachusetts, have invented an Improvement in Spindles, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in spindles for spinning or twisting machines and theobject thereof is to provide means for rendering a loose or a sagging driving band ineffective.

In order to produce uniform yarn from all of the spindles upon a spinning machine, it is necessary that all of the spindles shall be driven at the same predetermined speed and that a uniform rotation of each spindle shall be maintained for if one spindle rotates more slowly than another a different twist will be given to the yarn or thread thereby varying its character and tensile property; or if the speed of rotation of a spindle varies from time'to time a yarn will be produced which will vary in character, some portions being hard twisted while others are comparatively loosely twisted, in such case the more loosely twisted portions of the yarn or thread are much more easily broken.

The uneven driving of the spindles is usually occasioned by thestretching of the driving band which passes from the driving cylinder around the whirl. The present in vention contemplates broadly the production of means for rendering the action of the driving band ineifective and permitting the spindle to stop when the driving band for the spindle becomes sufiiciently loose to produce an objectionable slippage on the whirl. This is accomplished in the preferred embodiment of the invention disclosed herein by providing the whirl with means which will engage a loose and sagging band and ship it from the whirl so that the spindle will no longer be driven.

Other objects and features of the invention will more fully appear from the following specification and the accompanying drawing and will be pointed out in the annexed claims.

The drawing illustrates a typicalform of spindle provided with a whirl embodying the invention.

In the drawings:

Figure 1 is a side elevation of a spindle bolster carrying a spindle and whirl embodying one form of my invention and showing the driving band in dotted lines.

Fig. 2 is a transverse sectional view of a whirl upon the horizontal plane of the apex of the drivingband groove.

Fig. 3 is a detail side elevation of a whirl looking toward the initial end of the cam which is positioned to engage a loose and sagging band and ship the same from the whirl.

Fig. 4 is a side elevation of a bolster, spindle and whirl showing a different form of device for shipping a loose band from the whirl.

Fig. 5 is a transverse sectional view through the whirl illustrated in Fig. 4 upon the horizontal plane of the apex of the drivingT groove.

he spindle illustrated in the accompanying drawings may be of the usual type comprising a blade 1 having a usual bushing 2 to fit the baseof a bobbin or other filling carrier, the spindle being seated in a bolster 3 of the usual type having a screw threaded lower portion 4 adapted to be secured to the frame or rail of the spinning machine. a The bolster 8 is provided with the usual upwardly extending post 5 providing an oil reservoir, said reservoir having a pivotally mounted cap 6 provided with a dofler guard 7 overlying the whirl and adapted to prevent the spindle from riding upwardly during its rotation. The whirl 8, which is formed inte ral with, or secured to, the spindle is provided with an annular V-shaped groove 9 to receive a driving band 10 which is substantially circular in cross section.

In order to render the driving band ineffective and stop the rotation of the spindle when the driving band becomes loose the lower wall 11 of the driving band groove is provided with a cam having its initial end extending in the direction of rotation of the spindle and terminating at a point below. and in proximity to, the horizontal plane of the apex of the driving band groove.

As illustrated in Figs.'1, 2 and 3, the lower wall 11 of the driving band groove is provided with a lug or projection 12 having an inclined cam face 13, the initial end 14 of which lies in proximity to the horizontal plane of the apex of the driving groove. The under surface of the cam 13 is so curved that when the driving band becomes loose and sags it will be engaged by the initial end of the cam and carried down by the surface 13 in such a manner that it will be shipped from the whirl and caused to drop upon the section 15 of the bolster which is beneath the whirl.

In the embodiment of the invention illustrated in Figs. 4 and 5, the lower wall 11 of the driving band groove is provided with a cut-away portion 16 having an under-cut surface 17 and a tapered upper surface 18 which merges into the under-cut surface 17. The junction 19 of'the upper and under-cut surfaces lies in proximity to the horizontal plane of the apex of the driving groove 9 so that when the driving band becomes sufliciently loose to drop down upon the inclined surface 18 it will be engaged by the initial end 19 of the under-cut cam face 17 and forced downwardly, thereby shipping it from the whirl on to the section 15 of the bolster as above described.

Other eXpedients may be employed for rendering the action of the driving band ineffective when the band becomes loose within the scope of the present invention.

While the invention is illustrated herein as applied to the usual Draper form of spindle, it will be understood that it is applicable to other types of spindles within the meaning of the following claims.

Having thus described my invention, what I claim as new and desire tofsecure by Letters Patent, is:

lpA vertical spindle for spinning and twisting machines comprising a whirl and having means for engaging and shipping the driving band therefrom when the latter becomes loose.

2. A vertical spindle for spinning and twisting machines comprising a whirl having a cam-faced member positioned to engage a sagging band and-ship it fromthe whirl. 7

8. A vertical spindle comprising a whirl having a V-shaped groove for "adriving band, the-lower wall of said groove beingprovidedwith a cam having its initial end extending in the direction of rotation of the whirl and located in proximity to the horizontal plane of the apex of the groove whereby said cam will engage a sagging band and ship the same from the whirl.

4. A whirl .for vertical spindles having an annular V-shaped groove for a driving band, the lower wall of said groove being provided with a cam having its end extending' in the direction of rotation of said whirl and adapted to engage a sagging driving band and ship the same from said whirl.

In testimony whereof l have signed my specificatlon. 

